Thread stop-motion for twisting and spinning machines.



W. KOZLAWSKI.

THREAD STOP MOTION FOR TWISTING AND SPINNING MACHINES.

APPUCATION FILED MAR. 28. 1914.

1,172,806. Y Y 7 Pat (lun 16.

W. KOZLAWSKI.

THREAD STOP moTIoN'FoR TWISTING AND SPINNING MACHINES.

APPLICATION FILED MAR. 28, I914.

Pafented Feb.

22, 1916. 5 SHEETS-SHEET 2- WJ m W. KOZLAWSKl.

THREAD STOP MOTION FOR TWISTING AND SPINNING MACHINES.

APPLICATION FILED MAR. 28, 1914.

1,172,806. Patented Feb. 916.

5 SHEETSS EE 3.

Witness es jmnyr f Wm W. KOZLAWSKI.

THREAD STOP MOTION FOR TWISTI-NG AND SPINNING MACHINES.

APPLICATION FILED MAR. 28, I914.

Patented Feb. 22, 1916.

5 SHEETS-SHEET 4.

w. KOZLAWSKI.

THREAD STOP MOTION FOR TWISTING AND SPINNING MACHINES. APPLICATION FILEDMARNZB, 1914.

1, 172,806. Patented Feb. 22, 1916.

5 SHEETSSHEET 5.

)hihesses:

THE COLU AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA UNITED STATES PATENT ()FFICE. I

'WLADYSLAW KOZLAWSKI, 0F WARSAW, RUSSIA.

THREAD STOP-MOTION FOR TWISTING AND SPINNING MACHINES.

Specification of Letters Patent.

Divided and this application filed March 28, 1914. Serial N 0. 827,975.

To all whom it may concern.

Be it known that I, WLADYSLAW KOZLAW- SKI, architect, a subject of the Russian Empire, residing at 31 Terozolimska, Warsaw, Russia, have invented certain new and useful Improvements in Thread Stop-Motions for Twisting and Spinning Machines, of which the following is a specification.

This invention relates to thread stop-motions for twisting and spinning machines, which automatically clamp a thread yarn or roving when it breaks and comprises in combination with a thread clamping device of a thread guide lever which by the unbroken or mended thread inserted in its eye or hook is moved upwardly, whereby the clamping device is opened automatically, the lever being balanced in that elevated position fully or nearly fully against draft on the thread. The breakage of the thread causes the lever to rock downward, whereby the clamping device is closed. The lever may be held by the unbroken thread in an upright position against an abutment, and elastically bent by the tension of the thread, so that on breakage of the thread the spring action of the lever causes it to rock freely from its upright position and increases the power of that movement.

The thread guide lever may be preferably arranged to form itself the movable clamping jaw, or may act directly upon a particular wedge shaped movable clamping jaw to guide it against and from the fixed clamping jaw. The new stop motion may be applied to any machines using dry or wet threads, yarn or roving and also when the rollers rotate in any desired direction.

This is a divisional application of my application No. 669633 filed Jan. 5, 1912.

In the accompanying drawings various forms of the stop motion according to the invention are represented by way of example.

In said drawings :.Figures 1 to 10 show stop motions, whose thread guide lever forms itself the movable clamping jaw, used in ordinary twisting or spinning machines, while Figs. 11 to it show stop motions of this kind used in so called Scotch machines. Figs. 15-17 show a form, in which the thread guide lever imparts its movement to a wedge shaped movable clamping j aw.

Figs. 1 and 2 are side elevations of one form of the stop motion showing the parts before and after the clamping of the thread, wherein the fixed clamping jaw is a concentric roller 207 mounted on the axle 209, while the movable clamping jaw is an eccentric roller 208 mounted on the axle 210 v Patented Feb. 22, 1916. Original application filed January 5, 1912, Serial No. 669,633. Renewed May 7, 1912, Serial No. 837,073.

and bears the thread guide lever 214:. By

the tension of the thread, which passes between the clamping rollers 207, 208, around the under guide roller 219, and is inserted in the eye 215 of the thread guide lever, then around the upper guide roller 220, the said lever is held in upright position against an abutment formed by the bent part 212 of the plate 211 bearing the clamping rollers and serving to hold the stop motion on the beam 213. In that position the lever is bent by said tension elastically. When the thread breaks the spring-reaction of this bending causes the lever 214: to rock from its upright position downward, whereby the roller 208 mo-ves with its eccentric part against the thread in the eye 215 the lever 2141 will be brought again automatically in the upright position and open the clamping device. In

that position the lever is fully or nearly fully balanced against draft on the thread.

The eye or hook 215 may be preferably enameled or made of glass, china or the like to prevent wear.

The formv shown in Figs. 3 and 4 in side elevation without the guide-rollers difiers from that one according to the Figs. 1 and 2 only by the eccentric roller 208 being replaced by a similar formed end of an arm 208 swinging around the axle 210. The working of this form is the same as hereinbefore described.

In the form shown in Figs. 5 and 6 in side elevation and front view,the Figs. 7-10 being detailsthe thread guide lever 214 makes a loop 208 adjacent its fulcrum 210, that is to say it starts from the fulcrum in the direction opposed to thatin which the part bearing the eye or hook 215 lies, and is then bent around and toward the fulcrum.

axle 210 of the lever and rests with its bent part the beam 213. The axle 210 passes through two lugs of the plate 222 and. is held fast by a collar and a nut 221. The plate is preferably made of a single piece of metal, stamped out with the requisite lugs and then bent as shown. Normally the lever occupies the erected position in which it is shown in solid lines in Fig. 5, but when the thread breaks the released lever rocks into the position indicated by dotted lines, in which the thread is gripped between the parts 207, 208, and its travel is stopped.

For the use in Scotch machines, which twist wet threads, two forms of the new stop motion are shown in the Figs. 11 and 12 and in Figs. 13 and 14 in side elevations with unbroken and broken thread. Obviously these forms are based on the same principle as those illustrated in Figs. 1-10. The difi'erence consists mainly in the position of the clamping-faces. In Figs. 11 and 12 the aXles 209 and 210 of the clamping rollers 207, 208 are fastened to the upper end of the plate 211, which has an eye 218 for the thread coming from the bobbins and stands on the beam 213 to which it is secured in usual manner. Instead of the groove 216 (Fig. 1) the roller 208 has a rib 217 inserted partly in a corresponding recess, said rib abutting against a projection 221 of the plate. 211, when the lever 214, by the tension of the thread passing from-the upper guide roller 220 through the eye 215 to the spindle, is drawn into the position of Fig. 11 in which it is elastically bent. The reaction of this bending on breakage of the thread causes the lever 214 to rock to the right into the position of Fig. 12, wherein the thread is clamped by the rib 217 against the roller 207. In all the described forms said reaction is so strong, that the lever rocks to fall over when it has in its position of readiness an overweight to the upper guide roller.

The form shown in Figs. 13 and 14 differs from that of Figs. 11 and 12 only by the roller'207 being replaced by a plate 207 serving as abutment for the lever 214 and the roller 208 being replaced by a hoop 217 arranged at a part of the lever 214 lengthened beyond its fulcrum 210 to the other side.

The lever 214 need not be made in one single piece but may consist, for example, of an eye-part 214 made of wire, which is inserted into a sleeve or socket of the pivoted art.

Figs. 1517 show another form, wherein the thread guide lever acts not itself as thread gripper but imparts its movements to a particular wedge shaped movable clamping jaw which in this form is arranged horizontally. Fig. 15 is a side elevation, Figs. 16 and 17 are top plan views of the horizontal arranged clamping device in the opened and closed position for the use in Scotch machines. This stop motion is mounted onthe floor-frames 124, 124. Instead of the two- 1,172,soa

armed lever 114 a one-armed lever 114 rocking about the axle 115 and being fullyor nearly fully balanced by a weight 186 is used. In this stop motion the thread coming from the bobbins goes through the eye 134, then between the jaws 100 and i110, around the rollers 121 and 122, through the hook 123 of the lever 114, and onward. As the lever 114 is held by the tension of the thread against an abutment formed by one of the bridges 135, it is elastically bent. When a thread breaks the lever 114 rocks immediately about the axle 115 to the right; into the position shown in F :ig. 15 with dotted lines, the jaw 110 being shifted to the right (Fig. 17 and clamping the thread. By inserting the mended thread in the eye 123 the stop motion-is automatically brought in its original position.

What I claim is 1. An automatic thread stop motion. for twisting and spinning machines comprising in combination a thread-guide lever held by the tension. of the thread against an abutment and adapted to swing backward when. the thread breaks and a clamping device operatively connected with the lever and clamping the thread on the-breakage of it.

2. An automatic thread stop-motion for twisting and spinning machines comprising in combination a thread-guide lever held in erected position against an abutment and adapted to swing down when the thread breaks and a clamping device operatively connected with the lever and clamping the thread on the breakage of it, the said lever being of elastic material and bent by the ten sion of the thread, so that by the spring reaction of the lever on the breakage of the 7 thread the downwardmovement of the lever is accelerated.

3. An automatic thread. stop-motionfor twisting and spinning machines comprising in combination a thread-guide lever held in I erected position against an abutment and being elastically bentlby the tension of .the unbroken thread, the leverbeing directly connected with the one part or" the clamping device adapted to engagea fixed part forming the other part of the clamping device.

4. An automatic thread stop-motion for twisting and spinning machines comprising in combination a thread-guide lever held in erected position against an abutment'and i,

being elastically bent bythe tension ofthe unbroken thread, the lever being directly connected with the one part 01. the clamping device adapted to engage a fixed part form ing the other part of the clamping device,- thesaid one part forming an eccentric.-

osAn automatic thread stop-motion 'for twisting and spinning machines comprising in combination a thread-guide lever' held, in erected position against an abutment and being elastically bent by the tension of the unbroken thread, the lever forming itself the one part of the clamping device adapted to engage a fixed part forming the other part of the clamping device.

6. An automatic thread stop-motion for twisting and spinning machines comprising in combination a thread-guide lever held in erected position against an abutment and being elastically bent by the tension of the unbroken thread, the lever forming itself the one part of the clamping device adapted to engage a fixed part forming the other part of the clamping device, the said one part forming an eccentric.

7. An automatic thread stop-motion for twisting and spinning machines comprising in combination a thread-guide lever held in erected position against an abutment and being elastically bent by the tension of the unbroken thread, the lever forming itself the one part of the clamping device adapted to engage a fixed part forming the other part of the clamping device, the said one WVLADYSLAW KOZLAWSKI.

Witnesses ALFRED HEYMEL, AUDREY KUENRAJ.

Copies 01' this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

